Core for hollow brake-beams



(No Mod el.) T. FIELDEN.

GORE FOR HOLLOW BRAKE BEAMS.

No. 468,910. Patented Feb. 16,1892.

Atsi;

' UNITED STATES PATENT OFFIC THOMAS FIELDEN, OF ST. LOUIS, MISSOURI, ASSIGNOR TO THE UNIVERSAL BRAKE BEAM COMPANY, OF CHICAGO, ILLINOIS.

CORE FOR HOL'LOWBRAKE-BEAMS.

SPECIFICATION forming part of Letters Patent No. 468,910, dated February 16, 1892.

Application filed February 18, 1891- Serial No. 881,855. (No model.)

To aZZ whom it may concern:

Be it-known that I, THOMAS FIELDEN, of the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Reinforce-Cores for Hollow Brake- Beams, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to cores for insertion in and strengthening the truss ends of tubular brake-beams of cars, which ends are subjected to a heavy stress from the action of the truss-rod at the most vulnerable point r 5 where said tubular beam has been weakened by the cutting of the fiber of the metal in effegting the bore or slot for seating said trussro Figure I is a side detail view and shows one end of the tubular brake-beam with the elongated slot therein. Fig. II is a horizontal detail section and shows the end of the tubular brake-beam with my reinforce core inserted therein and a detail of the truss-rod passing through the core and seated in its cylindric chamber therein. Fig. III is a transverse vertical section taken on line III III, Fig. II, and shows the tubular brakebeam and the reinforce-core near its inner terminal. Fig. IV is a transverse vertical section taken on line IV IV, Fig. II, and shows the hollow brakebeam, the reinforce-core, and the truss-rod that passes through its tubular chamber in said core. Fig. V is a transverse vertical section taken on line V V, Fig. II, and shows the hollow brake-beam near one of its attachment ends, the reinforce-core having the cylindric truss-rod chamber and said truss-rod seated therein. Fig. VI is a perspective detail view of the tubular brake-beam and shows the slot cut therein for the insertion of the truss-rod, and Fig. VII is a perspective view of the reinforce core and shows the tube chamber through which the truss-rod passes and in which it is seat-ed. It also shows the recess formed by the removal of superfluous material at the end of said core around said tubechamber.

Referring to the drawings, 1 represents a tubular brake-beam, which is strengthened by the reinforcecore 2, that is preferably made of steel or malleable iron, but may be of any other suitable material. When of metal, the'cores are preferably made hollow I or cellular, having at the inner end a large cylindric chamber 3, which proceeds about or over three-quarters of the distance of the length of the core more or less. After having attained about half the distance from the inner end of the core to its outer end the said major cylindric chamber 3 has running diagonally across its line of bore the minor 'cylindric chamber 4, through which the trussrod 5 passes and in which it is seated. The circular escapemeut 6 0f the casting around said minor cylindric chamber 4, passing as it does diagonally across the large cylindric chamber 3, so as to make a bevel end to said chamber, reduces in transverse diameter as it approaches the end, so as to terminate in transverse section in the apparent form 7 of the moon in its third quarter. It will thus be seen that as the cavity of said major chamber is reduced toward its point, as it approaches the attachment end of the brake-beam, where 7 5 said beam is subject to the greatest stress,and diagonally crosswise of said bore between it and the attachment end of said beam, the cast incasement 6, that incloses the minor chamber 3, is placed at a brace angle to the end of said beam, and the truss-pressure from said rod is necessarily along the line of its diagonal incasement. It therefore follows that said reinforce-core braces the brake-beam against the severe truss-pressure along the best vantage lines to effect said purpose; also, as the main stress is approximating to' the end of said tubular brake-beam and as where the truss strain is the most severe there said tu bular beam is weakened by the elongated 0 slot 8 for the insertion of the truss-rod, which cuts the fiber of the metal and makes a dangerous initial starting-point for a prospective break. Therefore the said reinforce-core is inserted at each end of said brake-beam and the center of the bealmhaving to sustainbut aminimum of strain, is not reinforced by a core, as it is not there required.

9 represents a recess in the outer end of the core that reaches to the incasement 6 of the I070 minor cylindric chamber 4, that houses the truss-rod, which recess reduces theweight of the core at its extreme outer end by the reduction of that much of superfluous metal. The formation of the inclined cylinder 6, that houses the truss-rod in the core, presents an elongated inlet 10 at itsinner end, which registers just sufficiently ahead of the elongated slot 8 in the tubular beam to accommodate itself to the inclination of the truss-rod. Now it will be seen that the reinforce-core by strengthening the brake-beam at its points of greatest stress and where the fiber of the metal has been cut by the formation of the elongated slot 8 very largely increases its capacity to withstand thetrussing strain and it is thought to more than double the same.

The diagonal casein ent of the truss-rod chamber through said core, its diagonal lines run-- ning on line with said truss-draft, very materi'ally strengthens the truss attachment of the brake-beam.

\Vhen the hollow brake-beam in which my reinforce-core is inserted is provided with a recess at its end for the seating of a steadylug, then my recess 9 in the core, which re duces the weight of the core by a certain amount'of superfluous metal where it is not needed, also provides a seat for said protruding steady-lug that prevents the turning of the brake-head on said beam.

I claim as my invention- I 1. In an attachment for tubular brakebeams,a reinforce-core provided with the major chamber 3 at its inner end and the minor chamber 4, in which the truss rod is seated, substantially as and for the purpose set forth.

2. In an attachment for tubular brakebeams,hollow reinforce-cores inserted and fitted in the truss-rod ends of said hollow brake beams, the said hollow core having integral with it the diagonally-running cylindric incasement 6, that incloses and houses in the truss rod, the said incasement 6 running along in line with the tension-line of said truss-rod and thus on the best vantage brace-- line to reinforce the core as said core reinforces the hollow brake-beams, substantially as and for the purpose set forth.

3. In an attachment for tubular brakebeams, the combination of the tubular inner end 3 of the reinforce-core, the cylindric incasement 6, that passes diagonally through said core, angling across the line of the tube 3 and thus decreasing the size of said tubechamber 3 as it approaches the attachment -end of the hollow brake-beam in which said reinforce-core is inserted, thereby increasing the strength of the core as it approaches the line of greatest stress, and the truss-rod 5, that is housed within said diagonally-inclined incasemen't, substantially 'as and for the purpose set forth. p

4. In an attachment for tubular brakebeams, the combination of the tubular inner end 3 of the reinforce-core, the cylindric incasement 6, that houses in the truss-rod on a line diagonally across said tubular chamber 3, and said tubular brake beam being provided with the elongated slot 8, and said reinforce-core being provided with the elongated inlet 10, through which slot and inlet said truss-rod passes to its terminal seat, substantially as and for the purpose set forth.

THOMAS FIELDEN. I11 presence of BENJN. A. KNIGHT, SAML. KNIGHT. 

